John was piloting a plane behind a car but was never able to overtake it. Why?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

What has many teeth, but cannot bite?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

I know a nine-letter word having only one vowel.
Do you ?

Identify the 10 differences between the two given pictures.

What seven-letter word has hundreds of letters in it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What has no start, end, or centre?